I would try Eucalyptus oil or Hydrogen Peroxide

I use gumption on most stains and they usually lift quite well. If you’ve got some on hand give it a go, otherwise it’s about $5 from the supermarkets and makes the kitchen and other basins sparkle.

Try bicarb and vinegar, its my go to!

Toothpaste and a toothbrush! Not much that can’t get clean! I managed to get an almost 2 year old cord blood stain out of my baby’s first outfit! I’d tried lots of different stain removal products with no luck, but regular kids toothpaste and an old toothbrush worked magic!

I’d try Ajax or Jiff. I’d be surprised if they didn’t work.

firstly try a wet wipe, then, trial the next things im suggesting in tiny amounts first at the edge of the mark, on a cotton bud tip or similar. Id suggest a pea sized blob of cream cleaner, worked in tiny circles in wards. You could also try autosol or white toothpaste, again tiny amounts.The black marks atr in the surface, not on ut, which is why you need this aporoach rather than a spray/ wet option.

Eucalyptus oil can be helpful – test in a small unnoticeable patch though. I’m suggesting it as something that has cleaned a lot, but I’ve never used it on vinyl.

Can you try to rub it with rubber?